This is a client for the OpenStack Cinder API. There's a Python API (the cinderclient module), and a command-line script (cinder). Each implements 100% of the OpenStack Cinder API. See the OpenStack CLI Reference for information on how to use the cinder command-line tool. You may also want to look at the OpenStack API documentation. See also: https://github.com/openstack/python-cinderclient